US20130048751A1 - Method and device for operating an injection valve - Google Patents

Method and device for operating an injection valve Download PDF

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Publication number
US20130048751A1
US20130048751A1 US13/639,236 US201113639236A US2013048751A1 US 20130048751 A1 US20130048751 A1 US 20130048751A1 US 201113639236 A US201113639236 A US 201113639236A US 2013048751 A1 US2013048751 A1 US 2013048751A1
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United States
Prior art keywords
nozzle needle
switching valve
closed position
injection valve
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/639,236
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English (en)
Inventor
Vincent Dian
Christian Stahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Assigned to CONTINENTAL AUTOMOTIVE GMBH reassignment CONTINENTAL AUTOMOTIVE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DIAN, VINCENT, STAHL, CHRISTIAN
Publication of US20130048751A1 publication Critical patent/US20130048751A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/003—Measuring variation of fuel pressure in high pressure line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure

Definitions

  • This disclosure relates to a method and a device for operating an injection valve which is used in particular for dosing fluid, specifically in particular fuel.
  • DE 102005024194 A1 discloses an injection valve for dosing fuel, which injection valve comprises a body with a high-pressure supply, an actuating drive which acts on a switching valve, a control chamber which communicates with the high-pressure supply and whose control chamber pressure is dependent on the position of the switching valve.
  • the injection valve also comprises a nozzle needle whose position is dependent on the control chamber pressure.
  • a pressure sensor device is arranged in the high-pressure supply in such a way that the pressure sensor device can detect the pressure of the fluid in the high-pressure supply.
  • DE 10024662 B4 discloses a method for operating an injection valve having a piezoelectric actuator which is controlled by a control circuit.
  • the injection valve has a nozzle needle which, as a function of the pressure in a control chamber, can be moved into various positions in which different injection states of the injection valve can be set.
  • the pressure in the control chamber can be influenced by the piezoelectric actuator via a valve member which is connected to the piezoelectric actuator.
  • the valve member is formed simultaneously as a stop element for the nozzle needle.
  • the piezoelectric actuator is supplied with a predefined charge by the control circuit via two terminals. The voltage at the terminals is detected, and the pressure in the control chamber is determined from the voltage.
  • the control circuit controls the piezoelectric actuator as a function of the pressure in the control chamber.
  • DE 10162250 A1 discloses a fuel injection valve for the direct injection of fuel into a combustion chamber of an internal combustion engine, having a piezoelectric or magnetostrictive actuator and having a valve closing body which can be actuated by the actuator and which interacts with a valve seat surface to form a sealing seat.
  • the actuator is constructed from an opening actuator, a compensation actuator and a measurement element. In an actuation path between the actuator and the valve closing body there is provided a compensation gap.
  • the measurement element measures the forces exerted on the valve closing body by the actuator.
  • the actuator is regulated such that the compensation gap is kept closed.
  • the valve closing body is part of a valve needle, with fuel being dosed or not being dosed by means of the fuel injection valve as a function of the position of said valve needle. The actuator thus acts directly on the valve needle.
  • a method for operating an injection valve having a nozzle needle which prevents a dosing of fluid when in a closed position and otherwise permits the dosing of fluid, having a control chamber which is hydraulically coupled to the nozzle needle in such a way that the fluid pressure of said control chamber influences the position of the nozzle needle, and the pressure of which control chamber can be influenced by means of a switching valve which has a switching valve body, and having a solid body actuator which is designed to act on the switching valve body, wherein to execute a closing process of the nozzle needle, the switching valve body is controlled so as to move into its closed position by means of a partial discharge of the solid body actuator to a predefined partial charge in such a way that, even after the closed position of the switching valve body is reached, the solid body actuator is still coupled in terms of force to the switching valve body, and the solid body actuator is used as a pressure sensor during the execution of the closing process of the nozzle needle.
  • the predefined partial charge is determined in an operating state of the injection valve in which the nozzle needle is situated in its closed position, specifically through variation of the partial charge and as a function of a measurement signal of a pressure sensor which detects a fluid pressure in a fluid supply which is hydraulically coupled to the injection valve.
  • a device for operating an injection valve having a nozzle needle which prevents a dosing of fluid when in a closed position and otherwise permits the dosing of fluid, having a control chamber which is hydraulically coupled to the nozzle needle in such a way that the fluid pressure of said control chamber influences the position of the nozzle needle, and the pressure of which control chamber can be influenced by means of a switching valve which has a switching valve body, and having a solid body actuator which is designed to act on the switching valve body, wherein the device is designed such that, to execute a closing process of the nozzle needle, the switching valve body is controlled so as to move into its closed position by means of a partial discharge of the solid body actuator to a predefined partial charge in such a way that, even after the closed position of the switching valve body is reached, the solid body actuator is still coupled in terms of force to the switching valve body, and the solid body actuator is used as a pressure sensor during the execution of the closing process of the nozzle needle.
  • FIG. 1 shows an injection valve having a control device
  • FIG. 2 shows a flow diagram of a program which is executed in the control device.
  • Some embodiments provide a method and a device for operating an injection valve, which method and device permit a precise dosing of fluid by the injection valve.
  • embodiments provide a method and a device for operating an injection valve having a nozzle needle which prevents a dosing of fluid when in a closed position and otherwise permits the dosing of fluid.
  • the injection valve may include a control chamber which is hydraulically coupled to the nozzle needle in such a way that the fluid pressure of said control chamber influences the position of the nozzle needle, and the pressure of which control chamber can be influenced by means of a switching valve which has a switching valve body.
  • the injection valve furthermore has a solid body actuator which is designed to act on the switching valve body.
  • the switching valve body is controlled so as to move into its closed position by means of a partial discharge of the solid body actuator to a predefined partial charge in such a way that, even after the closed position of the switching valve body is reached, the solid body actuator is still coupled in terms of force to the switching valve body, and the solid body actuator is used as a pressure sensor during the execution of the closing process of the nozzle needle.
  • the predefined partial charge is determined in an operating state of the injection valve in which the nozzle needle is situated in its closed position, specifically through variation of the partial charge and as a function of a measurement signal of a pressure sensor which detects a fluid pressure in a fluid supply which is hydraulically coupled to the injection valve.
  • the partial charge can be predefined particularly precisely, specifically also as a function of the respective individual injection valve and the individual characteristics thereof.
  • an injection valve has an injector housing 1 which is furthermore assigned an adapter plate 2 , a nozzle body 4 and a nozzle clamping nut 6 .
  • the nozzle clamping nut 6 couples the adapter plate 2 and the nozzle body 4 to the injector housing 1 . It is basically also possible for the adapter plate 2 and/or the nozzle body 4 to be formed in one piece with the injector housing 1 .
  • the injector housing 1 furthermore has a fluid inlet 8 which is hydraulically coupled to a fluid supply which comprises for example a high-pressure fluid accumulator.
  • a fluid supply which comprises for example a high-pressure fluid accumulator.
  • a pressure sensor which can detect the pressure in the fluid supply.
  • a nozzle needle 10 which may comprise a control piston 12 .
  • the nozzle needle 10 may be of single-part or else multi-part form and thus comprise for example the control piston 12 as a separate part.
  • the nozzle body 4 there is formed at least one injection hole 14 which extends out of the nozzle body 4 to the outside proceeding from the recess.
  • the nozzle needle 10 When the nozzle needle 10 is in a closed position, it prevents a dosing of fluid through the at least one injection hole 14 .
  • the nozzle When the nozzle is outside the closed position, that is to say when the nozzle needle is situated in the axial direction along the longitudinal axis of the injection valve in a position shifted upward in the plane of the drawing in relation to its closed position, said nozzle needle permits the dosing of fluid.
  • a control chamber 16 is formed in the recess.
  • the control chamber 16 communicates via an inflow throttle 18 with the fluid inlet 8 .
  • the control chamber 16 is assigned an outflow throttle 20 , wherein downstream of the outflow throttle 20 there is arranged a switching valve 22 , as a function of the switching position of which hydraulic coupling to a low-pressure chamber 28 can be set.
  • the switching valve 22 comprises a switching valve body.
  • the switching valve body may have a valve piston 24 which acts on a valve head 26 .
  • the valve head 26 is preloaded into a closed position by means of a switching valve spring and is or is not moved out of said closed position as a function of the forces introduced via the valve piston 24 .
  • the solid body actuator 30 which acts on the switching valve body.
  • the solid body actuator 30 is formed for example as a piezoelectric actuator or as some other solid body actuator known to a person skilled in the relevant art for such purposes.
  • control device 32 which may also be referred to as a device for operating the injection valve and which generates actuating signals, in particular for the injection valve, as a function of at least one measurement signal of at least one sensor.
  • said injection valve has an electrical terminal 34 .
  • the solid body actuator 30 When electrical energy and thus in particular charge is supplied to the solid body actuator 30 , the latter extends and in particular firstly overcomes an idle travel between the solid body actuator 30 and the switching valve body and then, with increasing charge supplied, exerts an increasing force on the switching valve body, such that the valve head 26 then moves out of its closed position and fluid can thus flow out of the control chamber 16 via the outflow throttle 18 to the low-pressure chamber 28 and the pressure in the control chamber 18 thus falls.
  • a desired pressure drop can be effected when the switching valve 22 is open.
  • the resultant force acting on the nozzle needle 10 ultimately changes such that the nozzle needle 10 moves out of its closed position and thus permits the supply of fluid through the at least one injection hole 14 .
  • valve head 26 moves back into its closed position again, and the pressure in the control chamber 16 rises again, specifically until the resultant force on the nozzle needle 10 causes the nozzle needle 10 to move back into its closed position.
  • step S 1 ( FIG. 2 ) in which, if appropriate, variables are initialized.
  • step S 2 it is checked whether a closing process CL_V of the nozzle needle 10 should be executed. If this is not the case, the process is continued from step S 2 again, if appropriate after a predefined waiting time.
  • step S 4 the closing process CL_V of the nozzle needle is executed in step S 4 .
  • the switching valve body is controlled so as to move into its closed position by means of a partial discharge of the solid body actuator 30 to a predefined partial charge CH_P_SP in such a way that, even after the closed position of the switching valve body is reached, the solid body actuator 30 is still coupled in terms of force to the switching valve body. A situation is thus prevented in which an idle travel forms between the solid body actuator 30 and the switching valve body during the execution of the closing process of the nozzle needle.
  • a step S 6 during the execution of the closing process of the nozzle needle 10 , the solid body actuator 30 is then used as a pressure sensor. In this way, it is then possible, even after the closed position of the switching valve body, that is to say in particular of the valve head 26 , is reached, to still detect the pressure which is representative of the pressure in the control chamber 16 , and thus inter alia precisely detect the closed position of the nozzle needle being reached. For example, following the detection of the closed position of the nozzle needle 10 being reached, it is then also possible for the solid body actuator 30 to be discharged further, such that the partial charge is also discharged. This however need not imperatively be provided.
  • the predefined partial charge CH_P_SP may for example be determined in an operating state of the injection valve in which the nozzle needle 10 is situated in its closed position, specifically through variation of the partial charge CH_P_SP and as a function of a measurement signal of a pressure sensor which detects a fluid pressure in the fluid supply.
  • a so-called idle travel compensation function which can identify an onset of switching leakage at the switching valve 22 by means of the pressure sensor and thus precisely determine the required partial charge CH_P_SP at which it is ensured that force coupling exists between the solid body actuator 30 and the switching valve body and on the other hand there is no outflow of fluid from the control chamber 16 to the low-pressure chamber 28 , that is to say the switching valve body is in its closed position.
  • the predefined partial charge CH_P_SP may for example be predefined such that, when the predefined partial charge is present, there is a potential difference of approximately 30 V across the solid body actuator 30 . When the solid body actuator 30 is fully charged, a potential difference of approximately 130 V is for example present.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
US13/639,236 2010-04-08 2011-04-06 Method and device for operating an injection valve Abandoned US20130048751A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010014208.5 2010-04-08
DE102010014208A DE102010014208A1 (de) 2010-04-08 2010-04-08 Verfahren und Vorrichtung zum Betreiben eines Einspritzventils
PCT/EP2011/055303 WO2011124582A1 (fr) 2010-04-08 2011-04-06 Procédé et dispositif pour faire fonctionner une soupape d'injection

Publications (1)

Publication Number Publication Date
US20130048751A1 true US20130048751A1 (en) 2013-02-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13/639,236 Abandoned US20130048751A1 (en) 2010-04-08 2011-04-06 Method and device for operating an injection valve

Country Status (4)

Country Link
US (1) US20130048751A1 (fr)
CN (1) CN102822483A (fr)
DE (1) DE102010014208A1 (fr)
WO (1) WO2011124582A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015154949A1 (fr) * 2014-04-09 2015-10-15 Delphi International Operations Luxembourg S.À R.L. Procédé pour le contrôle et le diagnostic concernant le fonctionnement d'un injecteur de carburant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018131567A1 (de) * 2018-12-10 2020-06-10 Vermes Microdispensing GmbH Dosiersystem und Verfahren zur Steuerung eines Dosiersystems

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10162250A1 (de) * 2001-12-18 2003-07-03 Bosch Gmbh Robert Brennstoffeinspritzventil
US6943480B2 (en) * 2002-07-16 2005-09-13 C.R.F. Societa Consortile Per Azioni System for controlling a piezoelectric actuator, in particular for the fuel injectors of a diesel engine
US7712633B2 (en) * 2007-07-02 2010-05-11 The Clorox Company Through-pump liquid drain-back system for a dispensing package

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE19921456A1 (de) * 1999-05-08 2000-11-16 Bosch Gmbh Robert Verfahren und Vorrichtung zur Ansteuerung eines piezoelektrischen Aktors
DE10024662B4 (de) * 2000-05-18 2005-12-15 Siemens Ag Verfahren zum Betreiben eines Einspritzventils
DE10336816A1 (de) * 2003-08-11 2005-03-10 Bosch Gmbh Robert Verfahren und Anordnung zur Messung des Druckes im Steuerraum eines der Kraftstoffeinspritzung in Zylinderbrennräume von Brennkraftmaschinen dienenden Injektors, insbesondere Common-Rail-Injektors
DE102004063294B4 (de) * 2004-12-29 2006-11-16 Siemens Ag Verfahren und Vorrichtung zum Steuern eines Einspritzventils
DE102005024194A1 (de) 2005-05-25 2006-11-30 Siemens Ag Einspritzventil und Einspritzvorrichtung für eine Brennkraftmaschine und Brennkraftmaschine
DE102005040534B4 (de) * 2005-08-26 2007-11-29 Siemens Ag Ventil, Verfahren zum Herstellen des Ventils und Verfahren zum Einrichten einer Steuereinheit vor einer Erstinbetriebnahme des Ventils für ein Anstuern des Ventils
DE102008008111A1 (de) * 2008-02-08 2009-08-13 Continental Automotive Gmbh Einspritzventil, Verfahren und Vorrichtung zur Steuerung eines Einspritzventils
DE102008041527A1 (de) * 2008-08-25 2010-03-04 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoffeinspritzvorrichtung einer Brennkraftmaschine
DE102008039920A1 (de) * 2008-08-27 2010-03-04 Continental Automotive Gmbh Düsenkörper, Düsenbaugruppe und Kraftstoffinjektor, sowie Verfahren zum Herstellen eines Düsenkörpers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10162250A1 (de) * 2001-12-18 2003-07-03 Bosch Gmbh Robert Brennstoffeinspritzventil
US6943480B2 (en) * 2002-07-16 2005-09-13 C.R.F. Societa Consortile Per Azioni System for controlling a piezoelectric actuator, in particular for the fuel injectors of a diesel engine
US7712633B2 (en) * 2007-07-02 2010-05-11 The Clorox Company Through-pump liquid drain-back system for a dispensing package

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015154949A1 (fr) * 2014-04-09 2015-10-15 Delphi International Operations Luxembourg S.À R.L. Procédé pour le contrôle et le diagnostic concernant le fonctionnement d'un injecteur de carburant

Also Published As

Publication number Publication date
DE102010014208A1 (de) 2011-10-13
WO2011124582A1 (fr) 2011-10-13
CN102822483A (zh) 2012-12-12

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Date Code Title Description
AS Assignment

Owner name: CONTINENTAL AUTOMOTIVE GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DIAN, VINCENT;STAHL, CHRISTIAN;REEL/FRAME:029193/0801

Effective date: 20120925

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION